I am trying to find a way to use php or js that I can use to Injections into space header.

I am looking to create a code that can use  profile_id=26 when you are posting in space and update Visibility*  base on that Id since <optgroup label="SPACE">  and <option value="-26">HVAC Copper Fittings</option>   for example if the code look for id and and update the visibility for the Value automatically it would allow user to post what they are posting in the right place in space without having to choose from Visibility.